== Classical deployment pattern ==
[[File:Classic-deployment-pattern.png|600px|right|Dev -> Test -> Staging -> Production]]
In a classical development and deployment environment, (monolithic) software moves in stages between environments culminating in a "feature release" like a dump truck delivering a load of dirt. If you're delivering software this way, it's a complete misnomer to call this a feature release. Instead, it is a new "version", with a whole bunch of new features, bug-fixes and changes bundled together.
[[File:Dump truck in Acre, Brazil (cropped).jpg||600px|right|Dump truck in Acre, Brazil]]
== Modern deployment patterns ==In a Continuous Delivery environment, where testing is encouraged in "Production", changes are not delivered in a "big bang"or by the truck-load. It's possible to deploy features without exposing them to all usersand to deploy them as discreet enhancements.
For exampleModern deployment patterns in a Continuous Delivery environment include:
* Blue-green deployments* Canary releases* Dark launching* A/B testing* Progressive exposure or ring-based deployment* Feature toggles
[[Category:Continuous Delivery]]